Anyone know how well design template sites do?

[jag5311]

Since webdesign and graphic design is something I am highly interested in and something I am working on everyday, I have thought about starting my own design template site. I have come across a few, ones that offer like 10 categories, and sometimes up to 150 templates for a particular category. I just want to know if anyone has any idea how well those kinds of sites do (sales), traffic, ect.. most of the templates usually range from around $20. Is there a decent market out there for this kinda thing. I am pissed cuz the two domains i wanted are gone, jagdesigns.com and kohldesigns.com

Both are related to my identity.

Let me know your opinion of this situation

Bryan

p.s. If you guys know some good ones, could you post their URL's here